Acid-tank.



PATENTBD AUG. 29, 1905.

W. ONEILL.

ACID TANK.

APPLICATION FILED DEC.15, 1904.

2 SHEETS-SHEBT 1.

PATENTED AUG. 29, 1905. W. ONEI-LL.

ACID TANK.

APPLIOATION FILED 1350.15. 1904.

2 SHEBTS SHEET UNITED STATES PATENT UFHGE.

ACID-TANK.

Specification of Letters Patent.

Patented Aug. 29-, 1905.

Application filed December 15, 1904. Serial No. 236,934.

To ctZZ whom it inoty concern.-

Beit known that I, WILLIAM ONEILL, a citizen of the United States,residing in the borough of Brooklyn, city of New York, in the county ofKings and State of New York, have invented certain new and usefulImprovements in Acid-Tanks, of which the following is a specification.

This invention relates to and has for its object to provide an improvedtank or vat, and particularly one adapted for containing acids as, forinstance, electroplating-baths.

In the drawings accompanying and forming a part of this specification anembodiment of my invention is illustrated, wherein Figure 1 is a planview, portions of the top edging being removed to reveal the parts belowand part of the bottom being shown in horizontal section to illustratethe closing of the bottom seams. Fig. 2 is a side elevation of the tank,one end being shown in central section. Fig. 3 is an end elevation. Fig.4: is a detail in perspective, showing the manner of keying the boardstogether. Fig. 5 is a detail in perspective, illustrating a form of keyor bond in the nature of a band applied to the ends of the sideportions. Fig. 6 is a detail in perspective of a portion for forming theedging or finish for the top of the tank; and Fig. 7 is a detail inperspective, showing a means for forming a finish or edging for thebottom of the tank.

The tank in the form herein illustrated embodies a bottom portion 10,upon which in the present instance are mounted four sides 11, the sidesresting upon the bottom portion. Two of the sides are longer than theothers and would ordinarily be called the sides of the tank and theothers the ends of the tank. Each of such sides is made up of a numberof boards 12, having grooves at their abutting edges in which strips 13are placed to make tight joints. Such strips and grooves may be employedat all of the seams. One or more keyways 15 is placed across each sideor across the portions constituting the same, and the keyway tapers fromeach end toward the center, and the faces 16, 17 18, and 19 of suchkeyway are undercut. The key to go in such keyway also tapers from theends toward its center and are beveled to mate with the undercut. Suchkey comprises in the present instance two side members 20 and 21 and akey-wedge 22. By referring to Fig. 2 it will be seen that the keywayextends not only through the face of the side,

but through the edge of the bottom, the ta-' pering feature beingpresent in the edge of the bottom as well, so that the faces 24: and 26of the key will engage the faces 27 and 28 of the keyway in the bottom,and the reaction of the faces 23 and of the key on the faces 16 and 18of the keyway will draw the bottom tightly against the sides and theboards of the sides into close union. Not only are the sides boundtogether by means of these keys, but the bottom is bound to the sides ina similar manner. The ends 30 of the shorter sides enter mortises 31 inthe longer sides, which mortises may be made plain for convenience ofassemblage, and the longer sides may project at their ends, as at 32,past the shorter sides or ends and be bound together by means of keysanalogous to those heretofore described. Such extending ends 32 areshown as provided with keyways 33, each of which in the present instanceis undercut to provide faces 34, which keyways are wider at theiroutside portions 35 than at the inside portions 36. The key to [it suchkeyways and bond the sides together constitutes a pair of members 37 and38, each of which has a dovetailed end 39, adapted to lit the undercutand tapered keyway 33, and such members are expanded and held in theirposition by means of a wedge 40. A tank so constructed will uponbecoming moist immediately swell and its parts be held in strong andclose union, the pressure exerted by any one part reacting upon allparts when the tank is properly keyed together, and all pressures bytheir constraint and reaction will tend to tighten the joints and scams,and by this means a vat or tank is provided in which there is nometallic fastener. The fastenings being made of the same material ofwhich the tank is made will resist the action of any chemicals which thebody of the tank is capable of resisting. To give a finish to the topand also to prevent the accumulation of foreign material at the joints,the top may be given an edging comprising in the present instance sideportions and end portions 46, respectively, held in place by means ofpegs 47. The bottom of the tank may have an edging comprising endportions 48 and side portions 49, also held by pegs 50. The side membersmay be grooved out or recessed, as at 51, for the accommodation of aprotruding portion of the bottom keys. The form of construction hereinillustrated contemplates the sinking of but about half the width of thekey in the keyway. The

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depth of keyway when thus provided is sufliciently strong, and theapparent surplus ofmaterial in the key is to impart sufiicient rigiditythereto to Withstand the pressure to which it will be subjected.

It will be seen that the various parts of the tank are bound together,making a complete and united system of bonding. in the form illustratedthe boards at the bottom are held together by the key members providedtherefor, so that any tendency of the outermost edge boards of thebottom to move outwardly will be arrested. The key members for the endsand sides are also constructed for accomplishing similar purposes, andthe key members for the sides and ends, running down, as they do, into acontinuation of their key ways in the edge of the bottom, securely bindthe sides and ends to the bottom, not only to prevent verticaldisplacement from the bottom, but also to prevent lateral displacement.The dovetail keys enter the dovetail keyways in the edge of the bottom,which keyways are dovetailed in two transverse directions, which willprevent the sides from being pressed away from the bot tom laterally andwill also prevent them being separated from the bottom by movement in adirection vertical to the bottom, and the side portions or those sideswhich are transverse to the keyways across the bottom in pullinglaterally from the bottom will be restrained from such movements by thekeys in the bottom. In the construction illustrated such last-mentionedside keys are contiguous .to the keys in the bottom, and so form acontinuous band of keys running from the top edge of one side around thebottom and to the top edge of the other side. By this means the bottomsof the sides are most securely bonded to the bottom, and to prevent thesides from lateral expansion away from each other at other portions thanthe bottom the end bonds are employed, which will hold the side portionsagainst the-end portions throughout the body portion of the tank.

Having thus described my invention, I claim 1. A tank comprising abottom and four sides, the ends of two of the sides projecting beyondthe other two sides, and having transverse dovetailed keyways taperingfrom the outer face of the side toward the inner face, and which keywaysare also undercut, the bond for such ends having acorrespondinglydovetailed key portion at each end seated in such keyway,the bond being divided into two portions by a longitudinal section, anda tapering wedge expanding said parts of the bond in the keyways;

2. A tank comprising a bottom and four sides, said bottom comprising aseries of boards, a keyway having undercut edges and extending acrossthe boards, and tapering from the ends toward the center,acorrespondinglydovetailed key located in said keyway, the key beingdivided into two parts by a longitudinal section, a Wedge interposedbetween said sections expanding the keys in the keyway; each of the foursides being composed of a number of boards resting on the bottom, andeach side provided with a keyway extending transverse of the boards andhaving undercut edges, and made tapering from the outside to the middleportion, correspondingly-dovetailed keys located in each keyway, eachkey being divided by a longitudinal section at its middle portion, awedge inserted between said sections and forcing the keys into saidkeyways; the ends of two of the sides projecting beyond the other sidesand having transverse binding means in addition to said vertical bindingmeans, the latter comprising transverse dovetailed keyways in said endsof the sides tapering from the outer face inward, and which are alsoundercut, a correspondingly-dovetailed key located in such keyways, thekey being divided into two parts by a' longitudinal section, and a wedgeexpanding said sections of the key into such keyways.

Signed at Nos. 9 to 15 Murray street, New York, N. Y., this 10th day ofDecember, 1904.

WILLIAM ONEILL.

Witnesses:

FRED J. DOLE, C. D. RUSSELL.

